Platting-box.



E. L. DEARBORN.

PLATTING BOX.

APPLICATION FILED 14.53.14. 1911.

1,018,607. Patented Feb. 27, 1912.

WITNESSES INVENTOR 508% Wm %M M ATTORNEY COLUMBIA PLANOORAPH c0., WAsnmm'oN. D. c.

EUGENE L. DEARBORN, OF FAIRFIELD, CALIFORNIA.

PLATTING-BOX.

Specification of Letters Patent.

Patented Feb. 27, 1912.

Application filed March 14, 1911. Serial No. 614,315.

To all whom it may concern Be it known that I, E UGENE L. Dnannomv, citizen' of the United States, residing at Fairfield, in the county of Sol-ano and State of California, have invented a new and useful Platting-Box, of which the following is a specification in such full and clear terms as will enable those skilled in the art to constrnct and use the same.

This invention relates to a box for the purpose of transferring drawings from one sheet to another sheet.

It will be understood by those skilled in the art that it frequently becomes necessary to copy plats or other drawings in making reports and the work involves considerable labor if the drawing is made anew by hand. However, it the drawing can be copied upon tracing paper, itcan be very quickly and easily made. It is not always convenient to use tracing paper for this purpose and many reports must be upon a much heavier paper. which would be quite impossible to trace through in the ordinary way, but with this invention it is possible to trace through thick sheets of paper quite easily.

In the drawings in which the same numoral of reference is applied to the same portion throughout the several views. Figure 1 is a longitudinal vertical section through the apparatus, Fig. 2 is a transverse vertical section therethrough, and Fig. 3 is a perspective view thereof.

The apparatus comprises a box having vertical sides 1 at the top of which a glass plate 2 is suitably secured, said plate being enough smaller than the box proper to permit thumb-tacks to be pressed into the frame of the box at the edges of the plate to hold papers down thereon. The box is open at the bottom, but has a cross piece 3 connecting the sides upon which an electric lamp 4 is mounted. This lamp is secured to a socket 5 which has electric wires 6 leading therefrom to a socket 7 on the outside of the box. The socket 7 is adapted to be connected by means of a suitable cable 8 with any desired source of electricity. The plug 9 is connected in the ordinary lamp socket. The bar 3 supports a reflector 5 which is of such shape as to scatter the light over the entire under-surface of the glass plate 2.

Since the heat generated from the lamp is considerable, the glass plate becomes quite warm where the box is used a considerable length of time, and this is unsatisfactory, since it causes the ink being used to dry too rapidly. This defect is remedied by placing ventilation openings 10 in the ends of the box, said openings being so formed as to direct the incoming air against the under side oi. the glass plate 2.

ln a platting box in which a lamp of high candle power is used, the motor on is installed, said motor having a fan 11 on its shaft and bracket 12 supporting the motor in place. This motor may be a very small one and may be connected by means of wires 13 with the same circuit which operates the lamp. The gentle current of air thus produced. keeps the box cool and prevents the heat from the lamp from interfering with the operations ot the drattsman. The air from the fan is discharged from the box through the opening 14-, in the end of the box adjacent the tan.

in operation, the drawing to be copied is placed upon the glass plate 2 and the drawing to be made is placed upon the top of the completed drawing. The lamp is then illuminated. when it is very easy to trace the complete drawing upon the fresh sheet.

'Iracinos on thick card board can be easily made with this apparatus.

Having thus described my inventionwhat T claim as new and desire to secure by Lettcrs Patent of the United States is as follows:

In a. tracing apparatus, the combination with a box having a glass top and inlet openings formed therein to direct incoming air against the underside of said glass top and having a. dischar e opening. a lamp in said box and an electric tan mounted in said box, said tan being adapted to direct air into the box through the inlet openin s and to discharge the air through said discharge opening. substantially as described.

In testimony whereof T have hereunto set my hand this 6th day of March A. l). 1911, in the presence oi the two subscribed witnesses.

EUGENE L. DEARBORN. Witnesses:

C. P. GRIFFIN, L. H. ANDERSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington. I). (3. 

